It is impossible to collect all the yellow apples in level 9 because there are three apples in the Volcanic Appel part that wasn't deleted, and cant be reached normally. Here is where they are:

I think you still need to delete the game...

I know that when you are on an Apple iPad, you are able to enable a battery saver. Doing this when running the game Appel, slows the frame rate. Would uploading runs to the leaderboards in this state be valid?